How did the attack at the Gulf of Tonkin affect U. S. involvement in the Vietnam War? B. After the attack, U. S. involvement in the war greatly decreased, as war was too dangerous for American soldiers.
B. After the attack, U. S. involvement in the war greatly decreased, as the war was too immoral to fight.
C. After the attack, U. S. involvement in the war increased, as Americans wanted to fight back against the attack.
D. After the attack, U. S. involvement in the war increased, as Americans believed the war was near its end.

In early August 1964, two U.S. destroyers stationed in the Gulf of Tonkin in Vietnam radioed that they had been fired upon by North Vietnamese forces. In response to these reported incidents, President Lyndon B. Johnson requested permission from the U.S. Congress to increase the U.S. military presence in Indochina.

Explanation:

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.